Present in a canon, religious or otherwise.
In canonical form.
Distinguished among entities of its kind, so that it can be picked out in a way that does not depend on any arbitrary choices.
Part of canon (“the main continuity of a fictional universe”).
Stated or used in the most basic and straightforwardly applicable manner.
Prototypical.
In conformity with canon law.
In the form of a canon.
Of or pertaining to an ecclesiastical chapter
According to recognised or orthodox rules.
The formal robes of a priest.
A URL presented in canonical form.
Like a church; (solidly or piously) Christian.
Participating in the world at large; ecumenical, mainstream, non-insular.